/*
 * This file contains code from "C++ Primer, Fourth Edition", by Stanley B.
 * Lippman, Jose Lajoie, and Barbara E. Moo, and is covered under the
 * copyright and warranty notices given in that book:
 *
 * "Copyright (c) 2005 by Objectwrite, Inc., Jose Lajoie, and Barbara E. Moo."
 *
 *
 * "The authors and publisher have taken care in the preparation of this book,
 * but make no expressed or implied warranty of any kind and assume no
 * responsibility for errors or omissions. No liability is assumed for
 * incidental or consequential damages in connection with or arising out of the
 * use of the information or programs contained herein."
 *
 * Permission is granted for this code to be used for educational purposes in
 * association with the book, given proper citation if and when posted or
 * reproduced.Any commercial use of this code requires the explicit written
 * permission of the publisher, Addison-Wesley Professional, a division of
 * Pearson Education, Inc. Send your request for permission, stating clearly
 * what code you would like to use, and in what specific way, to the following
 * address:
 *
 *  Pearson Education, Inc.
 *  Rights and Contracts Department
 *  75 Arlington Street, Suite 300
 *  Boston, MA 02216
 *  Fax: (617) 848-7047
*/

#include <typeinfo>
using std::bad_cast;

#include <iostream>
using std::cout;
using std::endl;

void exercises()
{
	struct A {
		virtual ~A() { }
	};
	struct B : virtual public A { /* ... */
	};
	struct C : public B { /* ... */
	};
	struct D : public B, virtual public A { /* ... */
	};

	A* pa = new C;
	if (B* pb = dynamic_cast< B* >(pa))
		cout << "cast from C to B* ok" << endl;
	else
		cout << "cast from C to B* not ok" << endl;
	B* pb = new B;
	if (C* pc = dynamic_cast< C* >(pb))
		cout << "cast from B to C* ok" << endl;
	else
		cout << "cast from B to C* not ok" << endl;

	A* pc = new C;
	if (B* pb = dynamic_cast< B* >(pc))
		cout << "cast C to B* ok" << endl;
	else
		cout << "cast C to B* not ok" << endl;

	A* pd = new D;
	if (B* pb = dynamic_cast< B* >(pd))
		cout << "cast D to B* ok" << endl;
	else
		cout << "cast D to B* not ok" << endl;
}

struct Base {
	virtual void f() {};
	virtual ~Base() {};
};

struct Derived: public Base { };

int main()
{
	Base* basePtr;
	basePtr = new Derived;  // basePtr actually points to a Derived object
	if (Derived* derivedPtr = dynamic_cast<Derived*>(basePtr)) {
		// use the Derived object to which derivedPtr points
	} else {  // BasePtr points at a Base object
		// use the Base object to which basePtr points
	}
	exercises();
}

void f(const Base& b)
{
	try {
		const Derived& d = dynamic_cast<const Derived&>(b);
		// use the Derived object to which b referred
	} catch (bad_cast) {
		// handle the fact that the cast failed
	}
}
